Compass

Yes! A simple, uncluttered compass that works as well as any other compass app, which is to say well enough if you calibrate it. But most other compass apps I have tried have some terrible drawbacks: lack of privacy, intrusive (sometimes noisy) ads, unreasonable prices, bloated engineering and/or battery drain, and so on. This is open source and works as well as others, without those flaws. The (optional) haptic feedback is kind of fun, like turning an analog dial when you rotate your phone.

Clean, simple design, no bells or whistles. The most complex it gets is the option to switch to true north (requires internet), and a reminder of how to calibrate your phone's sensor. Mine often gets mixed up, so that's pretty useful. It followed my phone's 'dark mode' setting, didn't request any permissions, and just got on with telling me what direction my phome was pointing.

Perfect functionality with no tricks. Problem solved once and for all. Thank you, developer.